Hamilton’s novel khaki model expands on its iconic field watch

Anyone who has owned a mechanical watch is familiar with the tactile joy of cranking up the movement. Feeling the gears wind as the crown turns and hearing the delicate clicking is better than any fidget toy.

The problem is that, unlike fidget toys, a movement can only be wound so much at a time. Overdoing it can damage the movement, and knowing how much and when to wind up is something of a guessing game if your watch doesn’t have a power reserve meter.

Fortunately, Hamilton introduced a power reserve complication to the hand-wound version of the Khaki Field watch in 2025. A semi-circular sub-dial just inside of 9:00 indicates how much juice is left in the Caliber H-23 movement.

Now, anyone who owns this variation of the fundamental military field watch knows exactly when the movement needs to be topped off, and when to stop turning the crown.

The helpful complication is placed in a 40mm variation of the Khaki Field Mechanical with a bead-blasted stainless steel case. It debuted with the collection’s foundational black and white dial motifs.

The Khaki Field Power Reserve line is now doubled in size with the addition of blue and green dial options. The particular shades of blue and green are carried over from the Khaki Field Quartz update from 2025.

Topped off

The Khaki Field Power Reserve dial is similar to the standard mechanical version, but with a portion of the military time track removed to accommodate the power reserve track.

“Power Reserve 80 Hours” is added to the dial as a fitting accompaniment to the new complication. It refers to the Caliber H-23 hand-wound variation of the ETA Powermatic 80 movement ticking away underneath.

The power reserve track is printed directly on the dial plate and mimics an automotive fuel gauge, going from “F” to “E” with a halfway-point marker. Old Radium Super-LumiNova in the meter hand matches the time handset and hour track.

Strapped up

Like the debut Kahki Field Power Reserve duo, the new green and blue dials are offered on two strap options. The more affordable alternative is a nylon NATO strap color-matched to the dial.

It is equipped with leather rings, leather-reinforced buckle holes and a stainless steel pin buckle.

The more elevated option is a three-link stainless steel bracelet with a bead-blasted finish that matches the case. It is fastened with a micro-adjustable folding clasp.

Availability and pricing

Power reserve meters help you responsibly enjoy the tactile buzz of cranking a hand-wound movement. It’s far more accurate than the 30-turn shot-in-the-dark I take every time I put on my old Khaki Field Mechanical (yes, I actually count it out).

The new blue and green Khaki Field Power Reserve dials join the existing black and white options, available now from Hamilton for $945 on a nylon NATO strap and $1,025 on a steel bracelet.

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